Medical & Clinical

eGFR, BAC, ovulation, BMI & clinical calculators.

Next Period Starts
-
Based on a 28-day cycle

Fertility Window

Estimated Ovulation
-
Most Fertile Days
-
Estimated Due Date (EDD)
-
0 Days to go!
Current Gestational Age
0 Weeks, 0 Days
Current Trimester
First Trimester
Target Weight Gain at Week 20
10 - 15 lbs
Pre-Pregnancy BMI: 23.3 (Normal)

ACOG Recommendations

Total Full-Term Goal
25 - 35 lbs
Estimated GFR
0
mL/min/1.73m²

Clinical Staging

CKD Stage
Stage 1
Kidney Function
Normal
Body Surface Area (BSA)
1.84 m²
Mosteller Formula
Estimated Blood Alcohol (BAC)
0.000%
Sober

Legal Limits & Clearance

Time until 0.00%
0.0 Hours
Total Alcohol Consumed
0.0 oz
Estimated Whelping Date
Select Date
63 Days Total Gestation

Milestones

Palpation (Check Puppies)
--
Ultrasound Date
--
X-Ray (Count Puppies)
--
CLINICAL REFERENCE HUB

The Ultimate Guide to Clinical Diagnostics & Health

Master the mathematics of the human body. From tracking fertility windows and calculating kidney function (eGFR), to determining exact IV Fluid rates and estimating BAC pharmacokinetics.

Reproductive Mathematics

Understanding the menstrual cycle and gestation requires applying standard physiological timelines to calendar dates. These formulas are standard tools used by obstetricians worldwide.

Naegele's Rule

The standard way to calculate an Estimated Due Date (EDD) is Naegele's rule: Take the first day of the Last Menstrual Period (LMP), add 7 days, and subtract 3 months. This assumes a standard 28-day cycle.

ACOG Weight Guidelines

The American College of Obstetricians and Gynecologists (ACOG) recommends different weight gain trajectories depending on starting BMI. An underweight mother should gain 28-40 lbs, while an obese mother should only gain 11-20 lbs.

Clinical Biomarkers & Vitals

In a clinical setting, raw measurements like blood pressure and serum creatinine must be converted into standardized metrics (like MAP and eGFR) to determine proper diagnosis and medication dosing.

eGFR (CKD-EPI 2021)

The estimated Glomerular Filtration Rate (eGFR) indicates kidney function. The modern CKD-EPI 2021 formula removed race as a variable for a more equitable standard.

Mean Arterial Pressure (MAP)

MAP is considered to be a better indicator of perfusion to vital organs than systolic blood pressure. A MAP greater than 65 mmHg is generally required to sustain organs. It is calculated by doubling the diastolic pressure, adding the systolic, and dividing by three.

Toxicology & Metabolism

Pharmacokinetics governs how fast drugs and alcohol are absorbed and eliminated by the body. Blood Alcohol Content (BAC) estimates the percentage of alcohol in the bloodstream.

Widmark's Formula

The standard model for BAC is Widmark's formula. It factors in biological sex because men generally have a higher body water percentage (around 58%) compared to women (around 49%), which dilutes alcohol more effectively.

Zero-Order Elimination

Alcohol follows zero-order kinetics, meaning the average human liver clears it from the blood at a constant rate of ~0.015% per hour, regardless of how much is present. Neither coffee nor cold showers speed this up.

Clinical Biomarker Methodologies

Clinical decision support relies on strict physiological equations to estimate renal function, cardiac output, and fluid resuscitation requirements. Our medical suite utilizes standardized algorithms validated by leading global medical institutions.

Core Clinical Formulas

  • QTc Interval: EKG reading of ventricular depolarization and repolarization, corrected for heart rate. Prolonged QTc (>500ms) risks Torsades de Pointes.
  • Maintenance IV Fluid (4-2-1 Rule): Pediatric and adult rule: 4 mL/kg for first 10 kg, 2 mL/kg for next 10 kg, 1 mL/kg for remaining weight.
  • Anion Gap: Used to diagnose metabolic acidosis. Formula: Sodium - (Chloride + Bicarbonate). Normal is 8-12 mEq/L.

Frequently Asked Questions

Kidney Health

What is a normal eGFR level?
A normal eGFR for adults is generally 90 or higher. An eGFR between 60 and 89 may indicate early-stage kidney disease, while an eGFR below 15 indicates kidney failure requiring dialysis or a transplant. eGFR naturally declines slightly as you age.
Why did the CKD-EPI formula change in 2021?
The older 2009 CKD-EPI formula included a race multiplier for Black patients, which led to systematic overestimation of kidney function and delayed referrals for specialized care. The 2021 update removed this variable, relying entirely on age, sex, and creatinine.

Alcohol Metabolism

What counts as a "Standard Drink"?
In the United States, a standard drink contains exactly 14 grams (0.6 ounces) of pure alcohol. This is mathematically equivalent to 12 ounces of 5% beer, 5 ounces of 12% wine, or 1.5 ounces of 40% (80-proof) distilled spirits.
Can eating food lower my BAC?
Food does not lower your BAC once the alcohol is in your bloodstream. However, eating food *before* or *while* drinking slows the absorption of alcohol into the bloodstream through the small intestine, preventing rapid spikes in your BAC.

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